Rotary encoders are highly useful as input device, i.e. to control a menu system in combination with some sort of display, or control ranges such as color range, volume, etc. Rotary Encoders look ...
#define LED_PIN 4 // Arduino GPIO4 is NodeMCU pin D2 //#define LED_PIN 16 // Blue LED on board. // milliseconds, will quickly become a bigger number than can be stored in an int. unsigned long ...
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